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add missing test for machine combiner when optimizing for size

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The minsize test will be fixed in the next commit.

llvm-svn: 244603
This commit is contained in:
Sanjay Patel 2015-08-11 14:29:45 +00:00
parent 8ea9afb887
commit 870596a89a
1 changed files with 30 additions and 0 deletions
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30
test/CodeGen/AArch64/mul-lohi.ll
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@ -1,5 +1,6 @@
; RUN: llc -mtriple=arm64-apple-ios7.0 -mcpu=cyclone %s -o - | FileCheck %s
; RUN: llc -mtriple=aarch64_be-linux-gnu -mcpu=cyclone %s -o - | FileCheck --check-prefix=CHECK-BE %s
define i128 @test_128bitmul(i128 %lhs, i128 %rhs) {
; CHECK-LABEL: test_128bitmul:
; CHECK-DAG: mul [[PART1:x[0-9]+]], x0, x3
@ -16,3 +17,32 @@ define i128 @test_128bitmul(i128 %lhs, i128 %rhs) {
%prod = mul i128 %lhs, %rhs
ret i128 %prod
}
; The machine combiner should create madd instructions when
; optimizing for size because that's smaller than mul + add.
define i128 @test_128bitmul_optsize(i128 %lhs, i128 %rhs) optsize {
; CHECK-LABEL: test_128bitmul_optsize:
; CHECK: umulh [[HI:x[0-9]+]], x0, x2
; CHECK-NEXT: madd [[TEMP1:x[0-9]+]], x0, x3, [[HI]]
; CHECK-NEXT: madd x1, x1, x2, [[TEMP1]]
; CHECK-NEXT: mul x0, x0, x2
; CHECK-NEXT: ret
%prod = mul i128 %lhs, %rhs
ret i128 %prod
}
; FIXME: This should be the same as the optsize test above.
define i128 @test_128bitmul_minsize(i128 %lhs, i128 %rhs) minsize {
; CHECK-LABEL: test_128bitmul_minsize:
; CHECK-DAG: mul [[PART1:x[0-9]+]], x0, x3
; CHECK-DAG: umulh [[CARRY:x[0-9]+]], x0, x2
; CHECK: mul [[PART2:x[0-9]+]], x1, x2
; CHECK: mul x0, x0, x2
%prod = mul i128 %lhs, %rhs
ret i128 %prod
}